Prevent placement of meshhand nodes

mods/PLAYER/mcl_meshhand/init.lua

@@ -6,16 +6,32 @@ local def = minetest.registered_items[""]
 if has_mcl_skins == true then
 	--generate a node for every skin
 	for _,texture in pairs(mcl_skins.list) do
+		-- This is a fake node that should never be placed in the world
 		minetest.register_node("mcl_meshhand:"..texture, {
 			description = "",
 			tiles = {texture..".png"},
-			inventory_image = "blank.png",
+			inventory_image = "wieldhand.png",
 			visual_scale = 1,
 			wield_scale = {x=1,y=1,z=1},
 			paramtype = "light",
 			drawtype = "mesh",
 			mesh = "mcl_meshhand.b3d",
+			-- Prevent placement
 			node_placement_prediction = "",
+			on_construct = function(pos)
+				minetest.log("error", "[mcl_meshhand] Trying to construct mcl_meshhand:"..texture.." at "..minetest.pos_to_string(pos))
+				minetest.remove_node(pos)
+			end,
+			on_place = function(itemstack, placer, pointed_thing)
+				local spos = "<somewhere>"
+				if pointed_thing.above then
+					spos = minetest.pos_to_string(pointed_thing.above)
+				end
+				minetest.log("error", "[mcl_meshhand] Player tried to place mcl_meshhand:"..texture.." at "..spos)
+				itemstack:set_count(0)
+				return itemstack
+			end,
+			groups = { dig_immediate = 3, not_in_creative_inventory = 1 },
 			range = def.range,
 			})
 	end
@@ -30,13 +46,28 @@ else
 	minetest.register_node("mcl_meshhand:hand", {
 		description = "",
 		tiles = {"character.png"},
-		inventory_image = "blank.png",
+		inventory_image = "wieldhand.png",
 		visual_scale = 1,
 		wield_scale = {x=1,y=1,z=1},
 		paramtype = "light",
 		drawtype = "mesh",
 		mesh = "mcl_meshhand.b3d",
+		-- Prevent placement
 		node_placement_prediction = "",
+		on_construct = function(pos)
+			minetest.log("error", "[mcl_meshhand] Trying to construct mcl_meshhand:hand at "..minetest.pos_to_string(pos))
+			minetest.remove_node(pos)
+		end,
+		on_place = function(itemstack, placer, pointed_thing)
+			local spos = "<somewhere>"
+			if pointed_thing.above then
+				spos = minetest.pos_to_string(pointed_thing.above )
+			end
+			minetest.log("error", "[mcl_meshhand] Player tried to place mcl_meshhand:hand at "..spos)
+			itemstack:set_count(0)
+			return itemstack
+		end,
+		groups = { dig_immediate = 3, not_in_creative_inventory = 1 },
 		range = def.range,
 	})